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Abstract

We have proposed a spin transfer switching (STS MO-SLM) device, based on
Magneto-optical (MO) spatial light-modulation and driven by spin-polarized current flow,
and confirmed its basic operation and characteristics experimentally. The proposed SLM
device can be operated without active-matrix devices, has a spatial resolution as small
as several hundred nanometers and possesses the potential for being driven at ultra-high
speed of several tens of nanoseconds. Unlike existing SLM devices, this device satisfies
both the size and speed requirements of SLMs for use in displaying holographic
three-dimensional (3D) moving images. To improve the light modulation characteristics of
SLM device, we carried out studies on magnetic films with perpendicular magnetic
anisotropy to obtain large magneto-optical signals, which enabled us to realize enhanced
light modulation performance. In addition, we measured a MO signal that was about
twenty-times larger than that possible with in-plane anisotropy. We conclude that the
MO-SLM device that we are developing is suitable for displaying future super-high
definition, holographic three-dimensional moving images.

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